Finger nails with pits may be caused by external forces, nail malnutrition, gray nails, psoriasis nails and other factors. 1. The role of external forces: nails are subjected to external forces, such as smashing may lead to depression; frequent contact with chemicals, causing damage to the nails, resulting in nail depression; long-term contact with alkaline soap, petroleum products, may induce anti-nail; nails are exposed to cold water for a long time, which may also lead to depression. 2. Nail malnutrition: long-term partiality and picky eating, weight loss during the crowd, due to the lack of nutrients in the body, the growth of the nails have an impact on the nails, resulting in nail depression. It is recommended to pay attention to nutritional supplementation and give food containing B vitamins in the diet. 3. Gray nails: Fungal infections can cause damage to the nail bed and nail plate, resulting in thickening of the nails, color and texture changes, which is also the main reason for sunken nails. 4. Psoriasis Nail: Psoriasis may lead to lesions on the nail surface if it invades the nail bed or nail matrix. It can lead to thickening of the nail surface or the appearance of scattered small depressions. It is advisable to visit the hospital to find out the cause of the nail depressions. Treatment is focused on the primary disease, and the unevenness of the nails can be relieved when the causative factor is removed.